10,000 Birds

JULY 7, 2022

While females hatch from larger eggs and are initially heavier than their brothers, after ten days, the male chicks weigh almost 50% more than their sisters, as they receive a higher quantity and quality of prey from their parents ( source ). by taking advantage of the misfortunes or dregs of others.” ” ( source ). .”

Birds 147

Birds Australia Parrots Memphis 147

10,000 Birds

OCTOBER 21, 2015

Heermann’s Gulls form large breeding colonies on arid islands in the Gulf of California, Mexico, from March through July. The largest colony exists on Isla Raza, where an estimated 90–95% of the total world population breeds 1. This photo by Basar from Wikipedia Commons shows the adult in breeding plumage. www.youtube.com/watch?v=FUBX_tlHySc.

San Francisco 158

San Francisco North America Seals Sanctuary 158

10,000 Birds

JUNE 2, 2015

Third, observing and photographing breeding birds and their young have become acts of ethical confusion as birders, photographers, and organizational representatives debate the impact of our human presence on the nesting process. And of eggs and nests and birds on nests. Cedar Waxwings exchange berries, carry nesting material, eggs.

Eggs 263

Eggs Family 2006 New York 263

10,000 Birds

JUNE 18, 2014

The featured image above shows a female incubating eggs from my first resident breeding pair back in 2007. The four to six eggs are white and unmarked. It’s not as clear as the photo of the eggs above but I did not want to disturb the female as she was circling the nest to resume her duties.

Eggs 162

Eggs North America 2007 Woodpeckers 162

10,000 Birds

APRIL 25, 2012

Most of the Osprey breeding in North America are migratory, only Florida, the Caribbean and Baja California host non-migratory breeders 1. In migratory populations males usually arrive to breeding grounds a few days before the females and look for nest sites. This pair copulated several times while I was observing.

California 195

California North America Sacramento Breeders 195

10,000 Birds

SEPTEMBER 9, 2015

The nickel was placed in the nest for the photo to show me the size of the egg for identification purposes, then removed. Even though the female lays only two eggs per nest attempt, they enjoy a protracted breeding season in which multiple nesting attempts can occur every 30 days, and in Southern locations, nearly year round.

Hunters 173

Hunters Hunting North America Game 173

10,000 Birds

MAY 5, 2016

A letter requesting information on the permit issued to remove the nest got this response from the city, “In reference to your request for documentation for the removal of an active Osprey nest from the light pole at the soccer field, please be advised that none exist.

Transported 101

Transported Eggs Birds Killing 101

10,000 Birds

AUGUST 22, 2022

The Latin species name vermiculatus (worm-like) refers to the markings on the upperparts. However, it is kind of sophisticated in that the females lay very individualized eggs in order to be able to detect the added eggs of parasite cuckoo finches. The eyes make the Arrow-marked Babbler look a bit like a serial killer.

Zimbabwe 147

Zimbabwe Birds South Africa Benin 147

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JUNE 1, 2021

The photographs are from VIREO, the ornithological image collection associated with the Academy of Natural Sciences of Drexel University, which licenses bird photographs to many guides and reference books. They expand the definition of this book from identification guide to avian reference book. These are all informative and current.

North America 278

North America America Birds California Condor 278

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MARCH 22, 2018

The shape of the Osprey nest changes during the breeding cycle. Pairs average 59 successful copulations per clutch, starting 14 days before, and peaking a few days before, the start of egg-laying 1. Pairs copulate most often in early morning, at the same time as egg-laying 1. References: 1 Birds of North America Online.

Eggs 107

Eggs North America Fish America 107

10,000 Birds

AUGUST 13, 2014

” The report continues: “Following the breeding season, most tricolors are found in the Sacramento Valley where they aggregate with red-winged and other blackbird species and feed, often in large flocks, on ripening rice. References: 1 Birds of North America Online.

Blackbirds 185

Blackbirds California 2014 2013 185

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SEPTEMBER 24, 2014

These birds have lost more than half their global population, and the 33 species combined have lost hundreds of millions of breeding individuals in just the past 40 years. References: 1 Birds of North America Online. But it’s fun trying to figure it out by observing their behavior.

North America 186

North America 2014 California Birds 186

10,000 Birds

MAY 25, 2023

During the breeding season, some Cattle Egrets look like teenage girls who have just discovered the existence of make-up, and consequently massively overdo it. Still, the ability to identify a leaf warbler by song is a worrying development on the road to becoming a very nerdy birder. It is probably all downhill from here. What’s next?

Birds 130

Birds Raised Cattle Mammals 130

10,000 Birds

FEBRUARY 29, 2012

Within a group, 1–7 male co-breeders compete for matings with 1–3 joint-nesting females who lay their eggs in the same nest cavity. Groups may also contain up to 10 male and female non-breeding helpers, usually offspring of the group produced in prior years 1. References: 1 Birds of North America Online a.

Woodpeckers 183

Woodpeckers Breeders Groups North America 183

10,000 Birds

JUNE 20, 2012

In addition to their homing tendency, breeding swallows are attracted to old nests. It is illegal for any person to take, possess, transport, sell, or purchase them or their parts, such as feathers, nests, or eggs, without a permit. Completed nests during this breeding season cannot be touched without a permit from the U.S.

San Diego 165

San Diego illegal California South America 165

10,000 Birds

JULY 18, 2012

Wood Duck ( Aix sponsa ) Female Incubating Eggs in a Nest Box “Many species of cavity-nesting birds have declined because of habitat reduction. This is the female incubating eggs in the nest box… and a couple of weeks later… then, at the ripe old age of 17 days, what’s going on out here? References: 1 Scott, Virgil E.,

North America 206

North America America Barn Owls Falcons 206

10,000 Birds

APRIL 10, 2013

About three billion birds fly north to the Boreal Forest each spring to build nests and lay eggs. About 3 billion of North America’s landbirds, 26 million of its waterfowl, and 7 million of its shorebirds breed here. There are nearly 100 species of which 50% or more of the entire population breeds in the Boreal Forest.

Obama 238

Obama 2008 United States Industry 238

10,000 Birds

JUNE 19, 2013

Even though the overall breeding range remains largely unchanged from that in the 1940′s, the entire coastal population has been in recent severe decline. The ecological requirements for Black Swifts to breed restrict them to a very limited supply of nesting locations. Photo from Wikipedia Commons taken by Terry Gray.

California 200

California North America Costa Rica Niger 200

10,000 Birds

FEBRUARY 25, 2013

Also from BirdLife International: In general it prefers areas where vegetation, boulders or other landscape features at ground level provide tunnels in which to shelter and to breed. Its eggs are not known, it does not migrate, and it feeds, I understand, on insects and worms.

Science 195

Science Transported Shelters South Africa 195

10,000 Birds

AUGUST 30, 2012

That said, the purpose is to cover the world-wide puffin picture, and North American puffin redoubts like Eastern Egg Rock, Matinicus Rock, and Machias Seal Island (confusingly referred to by the joint term Matinicus Seal Island in at least one instance.)

Puffins 126

Puffins Seals Europe Eggs 126

10,000 Birds

APRIL 7, 2020

It didn’t occur to me till I started reading The Falcon Thief: A True Tale of Adventure, Treachery, and the Hunt for the Perfect Bird that there was also a possible threat to the eagle herself: poachers, who steal raptor eggs and chicks. McWilliam realizes he’s dealing someone special, a career falcon egg-thief.

Falcons 198

Falcons United Kingdom Zimbabwe Eggs 198

10,000 Birds

SEPTEMBER 15, 2011

Penguins are flightless, but some species locomote over long distances on antarctic ice to travel between breeding grounds and the sea. They have special adaptations to stay warm and to keep their eggs and chicks warm.

Penguins 188

Penguins Seals Peru Science 188

10,000 Birds

DECEMBER 2, 2014

This is evident in the introductory material, which includes sections on The Origin and Evolution of Borneo’s Birds, Conservation in Action, Vegetation and Bird Life in Borneo, Climate, Rainfall and Bird Breeding Seasons, and Bird Migration. The plates show differing plumages as required by the individual families and species.

Brunei 172

Brunei Birds Asia China 172

10,000 Birds

FEBRUARY 6, 2024

They breed in colonies scattered around the Antarctic continent (the number ranges from 60 to 70, and as Kooyman points out, the colonies can drastically change in size from year to year) on the ice (and one of the things I learned from this book is how many different kinds of ice there is in the Antarctic) in the darkest months of winter.

Penguins 151

Penguins Seals Leopards Research 151

10,000 Birds

JULY 21, 2022

The Latin species name lamigellerus is a Latin phrase for ‘a small, thin, metal plate’ which refers to the flattened feather shafts, especially on the underparts. Studies on improving ostrich egg hatchability. Also, I learned that in the US , ostrich eggs are priced at $40-$75. Ostriches originated in Asia.

Ostriches 147

Ostriches Parrots Birds Eggs 147

10,000 Birds

JULY 4, 2023

What the Owl Knows is organized into nine chapters: introduction, adaptation (including vision and flight), research and researchers, vocalization, courtship and breeding, roosting and migration, cognition, and two chapters on owls and humans–captive owls (not zoos, educational owls) and owls in our cultural history.

Owls 199

Owls Science Barn Owls Penguins 199

10,000 Birds

NOVEMBER 3, 2020

The goal of Around the World For Penguins is simple: Describe the 18 species of penguin and their breeding grounds “from the perspective of a traveller.” When we come to Gentoo Penguin again in the South Georgia chapter, for example, we’re referred back to its first appearance in Antarctica, utilizing the outline numbers.).

Penguins 277

Penguins Georgia New Zealand Albatross 277

10,000 Birds

JUNE 7, 2022

Most of this book is about Eurasian Wryneck, as the subtitle indicates, though Red-throated Wryneck is referred to throughout and there is a chapter focused on the species. The latter is a nonmigratory, African endemic with a scattered, limited distribution. and the rural Austrian folk name natterzunge or ‘adder tongue.’

Woodpeckers 223

Woodpeckers Hungary Thailand 2014 223

10,000 Birds

AUGUST 31, 2011

All New World Quail are highly gregarious, typically found in coveys or flocks except during breeding season. In California, coveys break up and pairs begin forming in February or March, followed by nest building and egg laying in May or June. She will usually lay 12 to 17 eggs, averaging five per week 1 , before beginning incubation.

California 211

California Eggs Gophers Rattlesnake 211

10,000 Birds

JULY 16, 2013

Formerly known as Jackass Penguins , a reference to their strange braying calls, African Penguins have become the unofficial mascots of marine conservation in the region. On the mainland they face predation from domestic cats, dogs, genets, mongoose and Cape Gulls which steal their chicks and eggs.

Penguins 206

Penguins South Africa Africa Sharks 206

10,000 Birds

SEPTEMBER 4, 2012

The length of each bird species account varies, depending on whether the bird is native or a “visitor” (the book’s term for migrant) or vagrant, breeding or non breeding. They breed in dense colonies, incubate their single egg on the feet, and take more than a year to fledge a chick.

Georgia 172

Georgia Penguins Wildlife Whales 172

10,000 Birds

JULY 25, 2022

When these birds breed, this can lead to highly cringeworthy announcements, for example from Adelaide Zoo : “We have egg-citing news!” Breeding pairs form exclusive social bonds, yet each partner will still mate with other individuals.” It seems that quite a few zoos keep Tawny Frogmouths. ” ( source ).

Birds 216

Birds Australia Ducks Mountain Goats 216

10,000 Birds

MAY 15, 2023

Unfortunately, the Ashy Drongos did not exactly do what he predicted that they would do – mob potential predators more frequently during the breeding season and mob the more dangerous predator (in this case, the Black Eagle) more intensely. Helps birds to avoid flirting with species mates they have no sexual interest in.

China 175

China 2017 Birds Indonesia 175

10,000 Birds

JANUARY 9, 2023

Another, somewhat more interesting study suggests that nest sanitation (ornithologists speak for cleaning up your room) helps Common Tailorbirds to recognize and eject parasitic eggs. As usual, this refers to the silvery-grey color of the male rather than the brown color of the female.

China 147

China Hunting Birds illegal 147

10,000 Birds

SEPTEMBER 9, 2014

How many eggs did a pigeon lay? He reasons out answers to both questions, finally stating that, despite what many eyewitnesses wrote, the birds had to have laid more than one egg and that the birds had to have nested more than once a breeding season. Or the destruction of the forests, food source and breeding grounds.

2014 159

2014 Killing Michigan Kentucky 159

10,000 Birds

OCTOBER 3, 2017

The guide covers 747 breeding residents or regular migrants, 29 introduced species, and 160 vagrants, a total of 936 species. Only one species of penguin breeds on the Australian mainland; five additional species breed on sub-Antarctic islands. Subspecies are described under “Geographic variation.”

Australia 105

Australia Birds Penguins 2015 105

10,000 Birds

JULY 4, 2012

This entire cycle begins in early Spring when Western Bluebirds pair up for breeding. The female alone incubates the usual 4 to 6 eggs for about two weeks beginning the day the last egg is laid. v=V1bFr2SWP1I References: 1 Birds of North America Online a. Until next time, I leave you with the late Israel Ka?ano?i

Washington 181

Washington Eggs California 181